From 25ae2ff0b8102d048d89669d82820787a1b2cb95 Mon Sep 17 00:00:00 2001
From: Alexander Sagen <alexander@sagen.me>
Date: Wed, 14 Aug 2024 12:59:43 +0200
Subject: [PATCH] cpp-httplib: Enable IPV6_V6ONLY flag to increase reliability
 of IPv4 service, as there are separate sockets for IPv4 and IPv6

---
 ext/cpp-httplib/httplib.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ext/cpp-httplib/httplib.h b/ext/cpp-httplib/httplib.h
index dfdd260ab..bcaf4557c 100644
--- a/ext/cpp-httplib/httplib.h
+++ b/ext/cpp-httplib/httplib.h
@@ -3163,13 +3163,13 @@ socket_t create_socket(const std::string &host, const std::string &ip, int port,
     if (socket_options) { socket_options(sock); }
 
     if (rp->ai_family == AF_INET6) {
-      auto no = 0;
+      auto yes = 1;
 #ifdef _WIN32
       setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
-                 reinterpret_cast<const char *>(&no), sizeof(no));
+                 reinterpret_cast<const char *>(&yes), sizeof(yes));
 #else
       setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
-                 reinterpret_cast<const void *>(&no), sizeof(no));
+                 reinterpret_cast<const void *>(&yes), sizeof(yes));
 #endif
     }